Steve, « White Pine Fever: The Studebaker Tree Sign », Web Ecoist, Momtastic, (consulté le ) : « A devastating ice storm in December of 2004 severely damaged many of the trees though reports of the sign’s deterioration seem to have sparked renewed interest in its preservation. »
« Navistar buys former Studebaker test track », South Bend Tribune, (lire en ligne, consulté le )
« A Piece of Living History », South Bend Tribune, (lire en ligne, consulté le )
(en) « Community briefs », South Bend Tribune, (lire en ligne)
wndu.com
Stang et Kusz, « Volunteers work to save sprawling Studebaker tree sign », WNDU-TV, (consulté le ) : « Efforts continue to save what's been called the world's longest-living outdoor sign. On Wednesday, volunteers gathered to plant more trees in an effort to restore the Studebaker tree sign at Bendix Woods County Park. »
